Muyiwa Olumide said he wants to "live and breathe" his product.
Actress wears brand's Sheer Side Slash tights made famous by Jessie J.
Runners reported breast pain and chaffing in an online survey.
King will leave the supermarket chain after 10 years as CEO.
Toro Rosso's new model has drawn attention from around the globe.
The singer wore the brand's AW13 garments in her new music video.